Telephone signaling device.



No. 773,187. PATENTED OCT. 25, 1904.

- D. M. BLISS.

TELEPHONE SIGNALING DEVICE.

APPLIUATION FILED SEPT. 19, 1902: I

NO MODEL.

UNITED STATES Patented October 25, 1904.

PATENT OFFICE.

DONALD M. BLISS, OF BROOKLINE, MASSACHUSETTS, ASSIGNOR TO HOLT- ZER-CABOT ELECTRIC COMPANY, OF BROOKLINE, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

TELEPHONE SIGNALING DEVICE.

SPECIFICATION forming part of Letters Patent No. 773,187, dated October 25, 1904.

Application filed September 19, 1902. Serial No. 124,090. (No model.) I

To a 1071 0177 it may concern.-

Be it known that I, DONALD M. lines, a citizen of Canada, residing in Brookline, county of Norfolk, and State of Massachusetts, have invented an Improvement in Telephone Signaling Devices, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

The present invention relates to a signaling or testing device for telephone systems, and is embodied in a self-contained apparatus adapted to be connected with a suitable motor to operate it, the object of the invention be- 5 ing to obtain a device of this kind which can be readily installed. These devices consist of,

traveling circuit-interru pters adapted to operate at different rates of speed for the purpose of giving different signals, and. it has heretofore been customary to install the various parts in each system so as to adapt the device to the motor and circuits in use. In accordance with the present invention, on the other hand, the instrument can be furnished as a 5 unit, being provided with all the adjustments which are necessary to connect the operating parts With any suitable motor and with binding-posts for the necessary circuit connections, there being no need, therefore. of building up 5 a special instrument at each plant.

To these ends the apparatus embodying the invention consists of a frame provided with bearings for the traveling members and gears connecting said members, the said frame being adjustable upon a suitable support or standard, while one of the shafts is provided with a flexible coupling or similar device adapted to be connected to the shaft of a suitable motor. By the adjustment of the frame,

4 therefore, the driving-shaft of the instrument can be brought into alinement with the driving-shaft of the motor and coupled thereto, the device being also provided with suitable binding-posts for connecting the circuit-conductors.

Figure 1 is a view in perspective of an instrument embodying the invention. Fig. 2

is a side elevation of the same, and Fig. 3 an end elevation.

The signaling devices are shown as commutators a a and Z) 5 mounted, respectively, on the shafts a and 12 which shafts are suitably geared together, so that when one is driven the other will rotate at a difierent rate of speed,the bearings for said shafts being mounted in a frame 0. The said frame 0 is supported upon abase (Z and is vertically adjustable with relation to said base, being shown as supported upon four posts 6?, the frame having sleeves 0 which fit the said posts, the said sleeves being split, as indicated at 0 and provided with clamping-screws 0*. Each of the commutators is supplemented by an unbroken contact memberf, while the segments of the commut'ators on the same shaft differ in length, so that two different signals can be obtained through the commutators on each shaft. To cooperate with the commutators, the frame is provided with brushes 6, having bindingposts 6 to receive the terminals of the conductors, and the two shafts are suitably geared together, the shaft a being herein shown as provided with a worm a, which meshes with a worm-gear b on the shaft Z2 As herein shown, the bearings for the shaft 6 are adjustable with relation to the frame 0 so that the gears can be brought into proper relation to each other without difficulty. As herein shown, the shaft a is utilized as a driving-shaft and is provided with a flexible covering a of any suitable kind, whereby it can be directly connected with the shaft of the motor, the frame 0 being vertically adjustable until the said shaft a is in alinement with the speed is usually high, and a direct connection with the high-speed shaft is most practicable. The gear connection between the shafts is such that the shaft Z) will rotate much slower than the other, so that the commutators thereon will control signals depending upon breaks of still less frequency, there being in the construction shown four signals of different characteristics produced by the machine. It is, however, obviously not essential that the machine should be limited to this number of signals, since the number of commutators might be increased or more shafts added differently geared, if desired.

It will be seen from the foregoing description that the device embodying the invention is complete in itself and ready to be installed in any telephone system, it being necessary only to adjust the frame to correspond to the motor which is used and to make the connections with the conductors of the circuit. This obviates the necessity of making a special instrument for every system, and therefore simplifies the instalment of the signaling devices in connection with the switchlmard.

I claim- In a telephone signaling device, circuit-interruptersmounted on rotatable shafts; speedchanginggears connecting said shafts; a frame provided with bearings for the said shafts; means for coupling one of said shafts to a motor; a support for the frame; and means for vertically adjusting said frame on said support to bring the coupling-shaft into alinement with the motor-shaft, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

DONALD M. BLISS.

Vitnesses:

H man J. Livmmomi, NANCY P. F0111). 

